Anthropic API
Claude 4 Opus & Sonnet API - leading coding and agentic AI
Anthropic · APIs
Quick Answer
Anthropic API is claude 4 opus & sonnet api - leading coding and agentic ai, made by Anthropic. It is a paid product. Key uses: AI application backends, Agentic coding, Document analysis.
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What is Anthropic API?
The Anthropic API provides access to Claude 4 Opus (top-tier coding, SWE-bench 72.5%), Claude 4 Sonnet (balanced), Claude 3.7 Sonnet (extended thinking), and Claude 3.5 Haiku. Features 200K context, vision, tool use, Computer Use, and MCP support.
What's new in Anthropic API in 2026?
Claude 4 Opus & Sonnet (May 2025) - top SWE-bench scores; claude-haiku-4-5 latest fast model; prompt caching up to 90% cost reduction; MCP tool-use native; batch API for 50% off async tasks
How much does Anthropic API cost?
Claude 4 Opus
$15/1M input tokens
- $75/1M output tokens
- 200K context
- Best reasoning & coding
- SWE-bench 72.5%
- Prompt caching available
Claude 4 Sonnet
$3/1M input tokens
- $15/1M output tokens
- 200K context
- Best speed/intelligence balance
- Computer Use
- Vision
Claude 3.7 Sonnet
$3/1M input tokens
- $15/1M output tokens
- 200K context
- Extended thinking mode
- Best for complex reasoning tasks
Claude 3.5 Haiku
$0.80/1M input tokens
- $4/1M output tokens
- 200K context
- Fastest Claude
- Best value for high-volume
What can you do with Anthropic API?
- AI application backends
- Agentic coding
- Document analysis
- Computer Use automation
- Multi-step agents
Pros
- Claude 4 Opus leads SWE-bench (72.5%)
- 200K context window
- Computer Use (GUI automation)
- Extended thinking (3.7 Sonnet)
- MCP tool use
- Prompt caching (90% savings)
Cons
- Cost at scale
- No image generation
What are the best alternatives to Anthropic API?
Compare Anthropic API Head-to-Head
Frequently Asked Questions about Anthropic API
How much does Anthropic API cost?
Anthropic API pricing: Claude 4 Opus at $15/1M input tokens; Claude 4 Sonnet at $3/1M input tokens; Claude 3.7 Sonnet at $3/1M input tokens; Claude 3.5 Haiku at $0.80/1M input tokens.
Is Anthropic API free?
Anthropic API is a paid product with no permanent free tier.
What is Anthropic API used for?
Anthropic API is used for: AI application backends, Agentic coding, Document analysis, Computer Use automation, Multi-step agents.
What are the best alternatives to Anthropic API?
Top alternatives to Anthropic API include OpenAI API, Cohere, Google AI Studio.